I'm not sure. As soon as I installed it and restarted later, the internet will not load. I had a connection but any page would just be endlessly loading. I would also get pop-ups asking me to disable the DNS client which I hit yes but it still says it's enabled. Upon uninstalling, the internet would still not work. On my friend's parent's computer, when I uninstalled it, there was an error and their desktop failed to load later on. Also, my PC Tools Firewall was messing up after I uninstalled HostsMan, because after the computer had started up, it would ask for me to let PC Tools Firewall PLUS start, and it would load after a bit. Not sure what was wrong but I restored an earlier point and have no HostsMan or PC Tools Firewall, just Windows Firewall.